Engine-power-increasing device



Dec. 9, 1924. 1,518,334

A. H. MCMASTER ENGINE POWER INCREASING DEVICE Filed June 23, 1924VPatented Dec. 9, 1924. l

UNITED VSTATES 1,518,334 PATE-NT OFFICE.

ARTHUR H. MOMASTER, OF LOS, ANGELES, CALIFORN/A:

ENGINE-rowEa-Incnnasme nnvrcni Application led June 23,

a citizen of the United States, residing at Los Angeles, in the countyof Los Angeles. and State of California, have invented certain new anduseful Improvements in Engine-Power-Increasing Devices, of which thefollowing is a specilication. i

My invention relates generally to engines, and more particularly to adevice that is applicable to practically all forms of fluid pressureengines having reciprocatory pistons, the purpose of said device beingto materially increase the power that is developed by the engine withwhichsaidI device is associated. My present invent-ion is an improvementon the engine power in-` creasing devices forming the subject matter ofmy co-pending applications for U. S. Letters Patent filed April 30,1923, andbearing the Serial Numbers 635,808 and 685,809.1

The principal objects of my present 'invention are to generally improveupon and simplify the construction of the devices disclosed in myaforesaid (zo-pending applications, as well as other forms of similardevices, to provide a relatively simple, practical, strong and durablepower increasing device that may be advantageously employed inconnection with internal combustion engines, steam engines or, in fact,any engine having a reciprocating piston that is acted upon by theexpansion of fluids or by the ignition and combustion of gases, liquidhydrocarbon. pulverized coal dust. powder or other similar explosivesubstances.

My invention contemplates a device that functions as a pitman orconnecting rod between the crank shaft and piston of the engine, whichdevice in operation enables the piston to remain stationary7 for asubstantial period of time at the inner end of its stroke or while athigh center and while the crank to which said piston is connected istraveling approximately 90 through the upper portion of its circularpath of travel, thus making it possible to obtain the maximum degree ofpower from the expansive forces of the Huid pressure that is admitted toor ignited within that portion of the combustion chamber above thepiston.

With the foregoing and other objects in view, my invention consists inthe features of construction, combination and arrangement of partshereinafter more fully yde- 1924. serial no, "151,787:l y f scribedandclai'med, ,reference being had to the accompanying dravgngsgfinwhich-' Figure 1 is a vvertical Segtlntakenlengthwise through thece11teri-ofane11gine cylinder having a reciprocating; piston'. andshowing Vmy improved power increasing; device applied thereto; y l

Figure 2 is ai vertical .section taken on the line 2 2 of Figure 1;.Figure 3 isa vertical section similar, to Figure 1showing almodifiedform o ,f the engine power increasing device; y

Figure -4 is,a ,vertieal\ section taken on the lineftf-.AiofFigureBs 1-,l.:;

Referring ,byE numeral n to the; accompanyille drawings.'and--pa1ftcular1=y` tafhe form of device illustratedin; 1 and 2, 10designatesannseeeylnden 1 1 thapiston that 4visvarnan edf0npperationwithin said Cylinder, 1-hte; Splzkrlna-.Qrfigntion-de- VCfthtfisiaeated'e tleghead ofthe Gylinder, an@ 13 the-.Crankshaft that isassociated 4with the. en, ;ine,l;a1id vwhich isprovided with `a cranksuch as zltfor each cylinder. My :inventioncontemplates a wrist =pin 15.having-litsgendseseatcd in the wall of piston 11 .andthe intermediateportion of said `wrist pin is provided Vwith a pair of cranks 16 and1*(` that arearranged diametrically oppositeto each otherfor- 180 apart.

A connecting rod or pitman 18 connects the crankg16 ofthe wrist pin withcrank 14 of the. crank shaft'13, and connected to crank 17 of the wristpinis one end of an auxiliary connecting rod' 19 that extends alongsideof the greater portion of connecting rod 18.- A pin or bolt, such as 20,passes through a longitudinally disposed slot 21 that is formed inthelower portion of connecting rod' 18, and said pin'is rigidly seated inthe lower portion of the auxiliary connecting rod 19. The lower or outerend of auxiliary connecting rod 19 is provided with a substantially T-shaped slot'22 that receives a guiding lrail orbar 23 that issubstantially T-shaped in crosssection and which is carried by the loweror outer ends of a pair of oppositely arranged arms' 24 that projectoutwardly from the skirt-'portion of the piston 11. This guidebar-'occupies a position at right angles to the axis of the crankupward, as desgnatedihy 213, se that lone During the opeiaton'ff thnn'Wit-11 which myv improved device associated, piston l18 in, itstravell'vibrates or swings alongside the'guidefbar 25, andas suchmovement takes place fthe lower end Aof the auxiliary 4connectln'g zrod29" slides lengthwise upon the guide bar, dueto 4the engagement of theslotted lowerenditliereof with said guide bar. As crank 14,ifvlliichftravels in ,the direction indicated by the arrowV in'Figure 1,approaches an la'ngularlpositi'on approximatelyx 45 in' advanceof high'center' position ofthe piston, the lwerend of'auxiliary v. conectingrod 19 is 'traveling on the approximately-straight"lowportion 'f of bar25,

andas crank 14 passe's'f fronithis,v position l,to high center the'auxiliary ,connecting rod 19 will, through its' "connectioiiwithcrankl17,

to which connecting red-'11s iscon'nected; and as a result', pistonllwillnialintain a prac.` tically stationary positibnfat itshigh centerorlwhile 'thefrank-i's'pa'slsiig 'from a! l point A ,y approximately 45inadvai'c'e'of high center to a point `fpprximatelyfg45f past highcenter. Du'ringthis 'timefth'e' compressed gaseous' fuel charge' isheld'nnder maximum compression, and said compressed `charge is not fireduntil the crank and connecting rod are substantially out of toggle or ata point approximately 45 pastvhigh center. Asthe lower end of auxiliaryrod 19 passes on to the curvedportion 26 ofthe guide rail, saidauxiliary rod commences to Vmove upward, thereby swinging craink17'toits 'upperl limit of movement and, consequently, swing lng crank 16 toits downward limit of move ment, such action taking place during thetravel of the crank from its high center position to a pointapproximately' 45 pasthigh center. This relative movement of thepistons'l is permitted by reason of the fact that pm 20 which is seatedin the auxiliary connecting rod is arranged so as to slide freelythrough slot 21 in the main connectmg rod 18. When crank 14 has reachedla point approximately 45 'past high center, the compressed gaseous fuelcharge above the p1ston 1s ignited and the ex ansion followingcombustion drives the piston downward 'on its power stroke and' duringthe jdownwardswinging movement`of the crank ll4 and the u ward'movementfthereof to 'a point approximately 45 in advance of highcenter, 'the two connecting' rods,' the pistons and wrlst pm all move asone part..

IIi tlie'mdilid construction illustrated in Figures' 3 and 4, wrist pin27 is provided with an eccentric 28 that receives the upper end ofmain'connecting rod 29, the lower end of the latter being connected tocrank SEU of crank sha-ft 31, and the upper end of that is carried byextension armson the piston of the engine, and the main and auxiliaryconnecting rods have la 'pin-and slot connection similar f to thepin-andslot connection between rods 18 and y19.

Gruidel bar 34 has an upwardly'curvedportion 35 and, as in thepreviously described construction, whenfthe lowerl end ofaux'ilfI iary'connecting rod 32 travels en ,"'to'this upwardlycurved end portion:of'thfef guide v rail, 'the upwardv swinging movement of crank arm 33moves eccentric`28 downward, therebyenablingthe piston with which thedev ice is' associated to remain stationary whilethe crank 30 istravelingthrough' the upper'portion of its path o f-travel ory from a,pointapproximately 45 in advance'f'of highcenter to apointapproximately 45 past high center. f V

' While I have shown anddescribedfmy `improved device as beingparticularlydesigned for use in connection with internal combustionengines, it willbe understood that practically the same structuremodified to suit conditions may be advantageously employed onpractically all types of reciprocating piston engines, which areoperated 'by steam, compressed air, crude oil, or by the practicallyinstantaneous combustion of pulveriz'ed coal or the like Thus it will beseen that I have provided relatively simple, practical and efficientmeans for materially increasing the effectiveness of iiuid pressureengines, the mechanism employed being of such structure as to be easilyand cheaply produced and readily installed.

It will'be understood that minor changes in thesize, form andconstruction of the various parts of my improved engine power increasingdevice may be' made and substituted for those herein shown and describedwithout departing from the spirit of the invention, the scope of whichis set forth inthe appended claims." I claim as my inventiont'- i 1. Inan engine, the combination'with the pistonv thereof, and 'the 'crankshaft, of a wrist pin mounted in the piston* land'having a pair ofbearing portions that are oifset relativeto the axis of s'aidwristl pin,a main connecting rod arranged between 4one of said bearing portions andthe crank shaft, an

auxiliary connect-ing rod connected to the other bearing portion of saidwrist pin and means carried by the piston and serving as a guidingbearing for the outer portion of said auxiliary connecting rod.

In an engine, the combination with the piston thereof, and the crankshaft, of a wrist pin mounted in the piston and having a pairof bearingportions that are offset relative to the axis of said wrist pin, a mainconnecting rod arranged between one of said bearing portions and thecrank shaft, an auxiliary connecting rod connected to the other bearingportion of said wrist pin, means carried by the piston and serving as aguiding bearing for the outer portion of said auxiliary connecting rodand a pin and slot connection between the main and auxiliary connectingrods.

3. In an engine, the combination with the piston thereof and the c'ankshaft, of a wrist pin joui-nailed in the piston and pro- `vided with apair of cranks that are arranged substantially opposite to each other, amain connecting rod arranged between one of said cranks and the crankshaft, an auxiliary connecting rod connected at its inner end to theother crank of the wrist pin, and a guide bar carried by the piston andwith which the outer end of the auxiliary eoni'iecting rod engages.

4. In an engine, the combination with the piston thereof and the crankshaft, of a wrist pin journalled in the piston and provided with a pairof cranks that are arranged substantially opposite to each other, a mainconnecting rod arranged between one of said cranks and the crank shaft,an auxiliary connecting rod connected at its inner end to the othercrank of the wrist pin, a

guide bar carried by the piston and with which the outer end of theauxiliary connecting rod engages and the two connecting rods havingsliding pivotal connection with each other.

5. An engine power increasing device comprising a wrist pin for thepiston of the engine, which wrist pin is provided with a pair ofeccentrically arranged bearing portions, main and auxiliary connectingrods connected respectively to said bearing portions, the mainconnecting rod being connected to the crank shaft of the engine and aguiding bearing for the outer portion of said auxiliary connecting rod.

6. An engine power increasingdevice comprising a wrist pin for thepiston of the engine, which wrist pin is provided with a pair ofeccentrically arranged bearing portions, main and auxiliary connectingrods connected respectively to said bearing portions, the mainconnecting rod being connected to the crank shaft of the engine, aguiding bearing for the outer portion of said auxiliary connecting rodand the outer portions of said connecting rods having sliding pivotalconnection.

7. The combination with an engine piston and crank shaft, of a wrist pinmounted in said piston and having an eccentrically arranged bearingportion, a rod connected to said bearing portion and said crank shaftand means associated with said wrist pin and rod for rocking said wristpin to shift the position of the bearing portion thereon during apredetermined portion of each cornplete rotation of said crank shaft.

In testimony whereof I aix my signature.

ARTHUR H. MCMASTER.

